internal static void InvalidateFontCache() { Lock.EnterFontFactory(); FontResolverInfosByName.Clear(); FontSourcesByKey.Clear(); FontSourcesByName.Clear(); Lock.ExitFontFactory(); }
//public static bool TryGetFontSourceByFaceName(string faceName, out XFontSource source) //{ // return FontSourcesByName.TryGetValue(faceName, out source); //} internal static void CacheFontResolverInfo(string typefaceKey, FontResolverInfo fontResolverInfo) { // Check whether identical font is already registered. if (FontResolverInfosByName.TryGetValue(typefaceKey, out FontResolverInfo existingfFontResolverInfo)) { // Should never come here. throw new InvalidOperationException(String.Format("A font file with different content already exists with the specified face name '{0}'.", typefaceKey)); } if (FontResolverInfosByName.TryGetValue(fontResolverInfo.Key, out existingfFontResolverInfo)) { // Should never come here. throw new InvalidOperationException(String.Format("A font resolver already exists with the specified key '{0}'.", fontResolverInfo.Key)); } // Add to both dictionaries. FontResolverInfosByName.Add(typefaceKey, fontResolverInfo); FontResolverInfosByName.Add(fontResolverInfo.Key, fontResolverInfo); }
//// Suffix for internal face names to indicate that the font data comes from the platform //// and not from the users font resolver. //public const string PlatformTag = "platform:"; /// <summary> /// Converts specified information about a required typeface into a specific font. /// </summary> /// <param name="familyName">Name of the font family.</param> /// <param name="fontResolvingOptions">The font resolving options.</param> /// <param name="typefaceKey">Typeface key if already known by caller, null otherwise.</param> /// <returns> /// Information about the typeface, or null if no typeface can be found. /// </returns> public static FontResolverInfo ResolveTypeface(string familyName, FontResolvingOptions fontResolvingOptions, string typefaceKey) { if (string.IsNullOrEmpty(typefaceKey)) { typefaceKey = XGlyphTypeface.ComputeKey(familyName, fontResolvingOptions); } try { Lock.EnterFontFactory(); // Was this typeface requested before? FontResolverInfo fontResolverInfo; if (FontResolverInfosByName.TryGetValue(typefaceKey, out fontResolverInfo)) { return(fontResolverInfo); } // Case: This typeface was not resolved before. // Is there a custom font resolver available? IFontResolver customFontResolver = GlobalFontSettings.FontResolver; if (customFontResolver != null) { // Case: Use custom font resolver. fontResolverInfo = customFontResolver.ResolveTypeface(familyName, fontResolvingOptions.IsBold, fontResolvingOptions.IsItalic); // If resolved by custom font resolver register info and font source. if (fontResolverInfo != null && !(fontResolverInfo is PlatformFontResolverInfo)) { string resolverInfoKey = fontResolverInfo.Key; FontResolverInfo existingFontResolverInfo; if (FontResolverInfosByName.TryGetValue(resolverInfoKey, out existingFontResolverInfo)) { // Case: A new typeface was resolved with the same info as a previous one. // Discard new object an reuse previous one. fontResolverInfo = existingFontResolverInfo; // Associate with typeface key. FontResolverInfosByName.Add(typefaceKey, fontResolverInfo); #if DEBUG // The font source should exist. Debug.Assert(FontSourcesByName.ContainsKey(fontResolverInfo.FaceName)); #endif } else { // Case: No such font resolver info exists. // Add to both dictionaries. FontResolverInfosByName.Add(typefaceKey, fontResolverInfo); Debug.Assert(resolverInfoKey == fontResolverInfo.Key); FontResolverInfosByName.Add(resolverInfoKey, fontResolverInfo); // Create font source if not yet exists. XFontSource previousFontSource; if (FontSourcesByName.TryGetValue(fontResolverInfo.FaceName, out previousFontSource)) { // Case: The font source exists, because a previous font resolver info comes // with the same face name, but was different in style simulation flags. // Nothing to do. } else { // Case: Get font from custom font resolver and create font source. byte[] bytes = customFontResolver.GetFont(fontResolverInfo.FaceName); XFontSource fontSource = XFontSource.GetOrCreateFrom(bytes); // Add font source's font resolver name if it is different to the face name. if (string.Compare(fontResolverInfo.FaceName, fontSource.FontName, StringComparison.OrdinalIgnoreCase) != 0) { FontSourcesByName.Add(fontResolverInfo.FaceName, fontSource); } } } } } else { // Case: There was no custom font resolver set. // Use platform font resolver. // If it was successful resolver info and font source are cached // automatically by PlatformFontResolver.ResolveTypeface. fontResolverInfo = PlatformFontResolver.ResolveTypeface(familyName, fontResolvingOptions, typefaceKey); } // Return value is null if the typeface could not be resolved. // In this case PDFsharp stops. return(fontResolverInfo); } finally { Lock.ExitFontFactory(); } }
public static bool TryGetFontResolverInfoByTypefaceKey(string typeFaceKey, out FontResolverInfo info) { return(FontResolverInfosByName.TryGetValue(typeFaceKey, out info)); }